package com.itheima.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.domain.*;
import com.itheima.dao.OrderDao;
import com.itheima.dto.OrdersDto;
import com.itheima.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderDao, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Autowired
    private OrderService orderService;

    @Override
    public void submit(Orders orders) {

        //A. 获得当前用户id, 查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();

        //B. 根据当前登录用户id, 查询用户数据
        LambdaUpdateWrapper<ShoppingCart> wapper = new LambdaUpdateWrapper<>();
        wapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wapper);

        if(shoppingCarts==null || shoppingCarts.size()==0){
            throw new CustomException("购物车为空,下单失败");
        }
        //查询用户数据
        User user = userService.getById(userId);
        //C. 根据地址ID, 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook==null){
            throw new CustomException("用户地址错误,下单失败");
        }
        //获取订单号
        long orderId = IdWorker.getId();
        //定义金额变量
        AtomicInteger amout = new AtomicInteger(0);
        //D. 组装订单明细数据, 批量保存订单明细

        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amout.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        //E. 组装订单数据, 批量保存订单数据

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amout.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        //更新数据
        this.save(orders);
        //向订单明细表更新数据
        orderDetailService.saveBatch(orderDetails);
        //F. 删除当前用户的购物车列表数据
        shoppingCartService.remove(wapper);
    }

    //历史订单查询功能
    @Override
    public Page<OrdersDto> findByPage(Integer page, Integer pageSize) {
        Page<Orders> pageInfo = new Page<>(page,pageSize);
        LambdaQueryWrapper<Orders> wapper = new LambdaQueryWrapper<>();
        wapper.orderByDesc(Orders::getOrderTime);
        Page<Orders> ordersPage = orderService.page(pageInfo, wapper);
        List<Orders> records = ordersPage.getRecords();
        List<OrdersDto> ordersDtos = JSON.parseArray(JSON.toJSONString(records), OrdersDto.class);
        Page<OrdersDto> dtoPage = new Page<>();
        dtoPage.setRecords(ordersDtos);
        dtoPage.setTotal(ordersPage.getTotal());

        return dtoPage;
    }

    //订单明细查询
    @Override
    public Page<OrdersDto> selectByPage(Integer page, Integer pageSize, String name) {
        Page<Orders> ordersPage = new Page<>(page,pageSize);
        LambdaQueryWrapper<Orders> wapper = new LambdaQueryWrapper<>();
        if(name!=null&&name!=""){
            wapper.eq(Orders::getNumber,name)
                    .or().eq(Orders::getOrderTime,name)
                    .or().eq(Orders::getCheckoutTime,name);
        }
        Page<Orders> page1 = orderService.page(ordersPage, wapper);
        List<Orders> records = page1.getRecords();
        //深克隆
        List<OrdersDto> ordersDtos = JSON.parseArray(JSON.toJSONString(records), OrdersDto.class);
        Page<OrdersDto> dtoPage = new Page<>();
        dtoPage.setRecords(ordersDtos);
        dtoPage.setTotal(page1.getTotal());

        return dtoPage;
    }
}